Re: [NTG-context] Purpose of backend (export=yes)

9 Nov 2010

      On 8-11-2010 3:52, Vladimir Lomov wrote:
...
I compiled them with context (mkIV, context minimal) and got
ex{1,2,3}.export. I thought that I get not only the document content but
also its logical structure (for example some markup for font switching).
Bold in itself is not structure so best tag it as (e.g.) important:

\setupbackend[export=yes]

\definestartstop[important][style=bold]

\starttext

This is second example.
This time we try to use font switching mechanism:
This is normal, but this \important{one is bold}. Normal again.

\stoptext
...
Is it true that 'backend' only output document content not its logic
strcuture? Does it work with math? The third example gives for math only
not letters.
Math becomes:

  This is inline formula
   <math>
     <mrow>
       <mi>𝐸</mi>
       <mo>=</mo>
       <mi>𝑚</mi>
       <msup>
         <mi>𝑐</mi>
         <mn>2</mn>
       </msup>
     </mrow>
   </math>
.
   <break/>
  This is display formula
   <formula>
     <formulacontent>
       <math>
         <mrow>
           <mi> 𝐸</mi>
           <mo>=</mo>
           <mi>𝑚</mi>
           <msup>
             <mi>𝑐</mi>
             <mn>2</mn>
           </msup>
         </mrow>
       </math>
     </formulacontent>
   </formula>
...
I attached the resulted export files.
P.S. Then I saw the announce about 'backend'&  'export=yes' I thought
that context would be good tool for notes. I imagine that I could wrote
a text file and make from it either pdf (for printing/screening) or html
(for screening) or may be convert xml (using existing tools and
methods) to other formats (rtf/odt/xhtml) that would contain math,
images, tables. But seems that I was wrong or this will be in future
of the backend?
indeed it should be possible to use context that way and afaik the 
export is already quite okay (you might need a recent luatex as there 
have been issues with attributes in math mode that were sorted out a 
while ago)

Hans

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